Some sloppy thoughts on anatomy, proportion and lighting:I wasn't sure how you intended to position the bent leg, so I tucked it underneath the other one. Not sure I like my colors, but hopefully this helps

Generally pretty good. but with the way the hips were turning, I think it would be good to show more of that change of direction. The navel is following a line that is out of sync with them. It's better to block out the whole pose first, of course. The knees are a bit large and unstudied ( more so the one on the left) and the arm is going out of its way to support the body, would be better as a straight line.